Bolted Connection of an End-Plate Cantilever Beam: The Distribution of Operating Force

Oman, Simon; Nagode, Marko

doi:10.5545/sv-jme.2017.4638

Cited by 12 publications

(9 citation statements)

References 6 publications

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“…This method of solution is typical for similar more complex cases of loading of multibolt connections, either for assembly or operating conditions [8,9]. An example of how the finite element method can be useful in improving or replacing existing calculation methods of a bolted connection of an end-plate cantilever beam can be found, for example, in [10]. Especially if it is combined with measurement in real conditions, i.e., with an experiment, the numerical approach has also proven successful in solving the effect of axial preload on the fatigue life of fastened joints in the aerospace industry [11].…”

Section: Finite Element Analysis Of Force Behavior In the Boltmentioning

confidence: 99%

“…A key source of information is the book by F. Pospisil [7], which is still one of the most detailed summaries of knowledge about bolted connections based on experiments and practical experience. Numerical calculation methods (FEM), as an alternative to existing theoretical approaches, have also been studied further in [8][9][10]. It has also proved very appropriate to combine the numerical approach with the experimental one as did T. Benhaddou [11].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Symmetry of Tightened Parts on the Force in a Bolted Joint

et al. 2023

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This article discusses the issue of force behavior in a pre-tensioned bolt that is part of a symmetrical flange connection, loaded with an operating load parallel to the bolt axis. The first part describes the issue being dealt with in detail. The next part offers a brief description of the generally known theoretical approach to the solution, and also outlines the limitations of this approach. This part is followed by a theoretical analysis of working load behavior in the bolt of the analyzed device, using Finite Element Method (FEM). In this article, a comparison of several different approaches to the solution can be also found, followed by a description of the experiment preparation and its results. The obtained values also serve as a subject for reverse iterative analysis carried out using ANSYS software. The aim is to find a proper modification to the symmetric calculation model that would be consistent with the results of measurements from technical practice. All results achieved are described in the final part of the article.

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Section: Finite Element Analysis Of Force Behavior In the Boltmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Symmetry of Tightened Parts on the Force in a Bolted Joint

et al. 2023

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“…Most bolted joints are made with several bolts, which are not evenly loaded. A case with an uneven load of bolts in a simple bracket-wall connection is described by Oman in [4]. An algorithm for calculating the force in individual bolts is given, based on numerical analysis and experiment.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Additional Load and Fatigue Life of Preloaded Bolts in a Flange Joint Considering a Bolt Bending Load

Okorn

Nagode

Klemenc

et al. 2021

Metals

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The influence of the working load on the dynamic loading of the bolt was investigated in our study for two cases of flange joints. The analytical calculation according to the Verein Deutscher Ingenieure (VDI) 2230 recommendation and the numerical analysis using the finite element method (FEM) were performed for a model of a four-bolt joint. To verify the FEM analysis, the forces in the bolts were measured during preloading and during the application of the working load on the test rig. Based on the analytical and numerical results, the influence of the working load application point on the bolt load and its fatigue life was analysed for different cases. Comparison of the results shows that the analytical method overestimates the additional bolt stresses at low working load, mainly due to the extremely large fraction of bending stress. As the working load increases, the differences between the two methods decrease, but only for the reason that the analytical method can only linearly scale the overestimated results at lower working load, and FEM analysis, on the other hand, shows a progressive increase of the additional stress in the bolt at higher working loads due to the spreading of the flange. It is also shown that a high washer significantly increases the fatigue life of the bolt for two reasons: (i) a high washer reduces the additional stress in the bolt, and (ii) the high washer shifts the critical fatigue point from the thread area to the transition of the bolt shank to the head.

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“…Most bolted joints are made with several bolts, which are not evenly loaded. A case with an uneven load of bolts in a simple bracket-wall connection is described by Oman in [4]. An www.videleaf.com algorithm for calculating the force in individual bolts is given, based on numerical analysis and experiment.…”

Section: Introductionmentioning

confidence: 99%

On the Influence of Additional Axial and Bending Loads on Fatigue Life of Preloaded Bolts

Okorn¹,

Nagode²,

Klemenc³

et al. 2021

Prime Archives in Material Science

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The fatigue life of preloaded bolts depends on the additional dynamic loading of the bolts, which depends on the size and location of the working force application. Due to the eccentricity of the working force, there is an additional bending load on the bolts, which has a significant effect on fatigue. In this study, the influence of the additional axial and bending load of bolts on fatigue is investigated analytically, numerically and experimentally for four different flange joints. Comparison of the results shows that the analytical method overestimates the additional bolt stresses at low working load, mainly due to the extremely large contribution of bending stress. As the working load increases, the differences between the two methods decrease, but only for the reason that the analytical method can only linearly scale the overestimated results at lower working load, whereas the FEM analysis shows a progressive increase of the additional stress in the bolt at higher working loads due to the spreading of the flange. Experimental verification confirmed that the FEM analysis can be considered as a reference method. By using a high washer, the critical point of the bolt is shifted from the first contact of the bolt thread with the nut thread to the transition of the shank to the bolt head. The reduced notch effect and larger cross-section at this point greatly increases the fatigue life of the bolt.

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Bolted Connection of an End-Plate Cantilever Beam: The Distribution of Operating Force

Cited by 12 publications

References 6 publications

Influence of Symmetry of Tightened Parts on the Force in a Bolted Joint

Influence of Symmetry of Tightened Parts on the Force in a Bolted Joint

Analysis of Additional Load and Fatigue Life of Preloaded Bolts in a Flange Joint Considering a Bolt Bending Load

On the Influence of Additional Axial and Bending Loads on Fatigue Life of Preloaded Bolts

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